Control device for sanders



June 15, 1926.

'IIIH 7 7 0:52:42 ATTOZ/YEYS Patented June 15, 1926.

UNITED STATES PATENT OFFICE.

LYMAN c. Josnri-rs, an, or ALLENTOWN, PENNSYLVANIA, assrsnon ro INTER- NATIONAL MGTOR COMPANY, or YORK, 1r. Y-., A CORPORATION or DELA- WARE. I I

CONTROL DEVICE SANDERS.

Application filed October 25, 1924. Serial No. 745,740.

This invention relates to automatic devices for controlling selectively one of two sanders depending upon the direction of travel of the vehicle on which the sanders are mounted. More particularly, the invention is concerned with such devices when combined with sanders adapted for electropneumatic operation. Heretofore, it has been the general practice to mount separate sanders at opposite sides of a vehicle wheel and where these sanders have been of electro-responsive type appropriate control cir :cuits have been placed within reach of the operator whereby one. circuit might be out out and the other cut in'manually depending upon the direction of travel of the vehicle. In accordance with the present invention it is proposed to employed electroresponsive controls for the sanders and associate with their respective circuits a switch element which itself is actuated automatically upon actuation of the mechanism for reversing the direction of travel of the vehicle. The circuit control thus efiected is such as to cut in one sander and cut out the other automatically.

One preferred embodiment of the improvements has been shown in the accompanying drawings in connection with the application of sanders to a rail car in which change speed devices of conventional type are employed, the control switch for the sander circuits being movable in this embodiment with the shifter rod for the reverse gear. In the drawings:

Figure 1 is a view in side elevation showing a sand reservoir with appropriate pipe connections for an air blast, an electro-responsive device for controlling the blast, suitable control circuits for two such electroresponsive devices and, conventionally, a reverse gear shifter rod with which a control switch is carried.

Figure 2 is a view in end elevation showing pipe connections from the sand reservoir leading to the opposite sides of a wheel of a vehicle.

Figure 3 shows conventionally circuits for two electro1nagnets for controlling the air blast which, in accordance with the improvements, are controlled selectively by a switch.

It will be understood as the description proceeds that the invention is not concerned with any of the details of the sanding mechanism per se nor, indeed, with the devices by which the discharge of sand is effected. For the purposes or this application, however, it may be assumed that a sand reservoir a is mounted on a rail car and has leading there from two downwardly extending sand pipes, one or which a may discharge onto the track at one side of a vehicle wheel and the other of which a may discharge on the other side or the same wheel n accordance with accepted practice. The discharge of sand through either one of these pipes may be effected by an air blast admitted through a suitable nozzle one of which is indicated for the pipe at at Z). A pipe 0 for another similar nozzle for the sand pipe or is indicated in Figure 1, the nozzles being, of course, side by side. An electro-magnet indicated at d may'actuate a suitable pneumatic valve by which a blast of air through one of the nozzles, say 6 from an air line 6 is admitted. A similar magnet f and valve are disposed right alongside of the magnet d to control an air blast through the pipe 0 for the other sander pipe a Both of these magnets are,- of course, grounded. The circuit wire for the magnet (Z is shown at d and the circuit wire for the other magnet is shown at 7. These wires are connected, respectively, to switch contacts 6Z2, f. Other switch contacts are indicated at (Z f and connected to a feed line 9. A switch it is illustrated as movable to close either one of the circuits cl, 7, by bridging the respective pairs of contacts 01 (Z or f, 7. In its broader phases the invention contemplates that such a switch may be movable with any part of the reversing mechanism of a rail car. The

particular embodiment shows the switch can for sanding when required on the proper side of the vehicle wheel. As indicated in Figure 3, of course, the actual sanding may always be under'the control of the operator through a single manually controlled switch is in the feed wire 9 but which of the two magnets cl, 7, is energized depends, of course, upon which of the circuits 7, d, is closed by the switch element It, in the manner described.

As indicated hereinbefore, no limitation as to the structural details of the sanding device and their operating means is intended since the principle of the invention is concerned entirely with the selection of appropriate sanding mechanism depending upon the direction of travel of the vehicle. The appended claims will define more particularly the breadth of the improvements.

hat I claim is:

1. In a vehicle, in combination with a plurality of sanders, electro-responsive devices to control the operation of the respective sanders and selective devices independent of the power control means and asso- 'ciated with the directional control mechanism for the vehicle to control the circuits of said electro-responsive devices.

2. In a vehicle, in combination with a plurality of sanders, electro-responsive devices to control the operation 01 the respective sanders, and a switch movable upon movement of the reversing mechanism and independent of the power control means for the vehicle to control the circuits of said electro-responsive devices.

3. In a vehicle, in combination with a plurality of sanders, electro-responsive devices for controlling the operation of the respective sanders, reverse speed mechanism for the vehicle and aswitch movable with said reverse speed mechanism and independent of the power control means to control the circuits of said electro-responsive devices.

l. In a vehicle, in combination with a plurality of sanders, electro-pneumatic devices for operating the respective sanders, a transmission including rcverse speed means, and a switch element carried with the reverse speed means to control the circuits of the respective electro-pneumatic devices selectively upon movement of the reverse speed mechanism.

This specification signed this 23 day of October A. D. 1924.

LYMAN C. J OSEPHS, JR. 

